From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-20.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 72942C43217 for ; Mon, 20 Sep 2021 18:48:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5C3F261350 for ; Mon, 20 Sep 2021 18:48:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1385040AbhITSta (ORCPT ); Mon, 20 Sep 2021 14:49:30 -0400 Received: from mail.kernel.org ([198.145.29.99]:59874 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1384092AbhITSqc (ORCPT ); Mon, 20 Sep 2021 14:46:32 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 579ED63362; Mon, 20 Sep 2021 17:33:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1632159215; bh=oUTH+wojMVJzqtmwNww4RdHNRycr2YogW+WBYDYXTz0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=lrUjOv9sEsf+y4eU3PEUUrdRzSBeCyc68qE+8unDxEeyQls7H5nJasf3gL1P2O2h6 TqPJLbysTQevtpv3MXao8VbVwdtFM0ec40eBc+dV95QcqVE39ApYHgTf6oVYJGE5TY nDdXg6Lbhidd7svyyi1gZpgA8xx9uQivsrrhmS3g= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Dan Carpenter , Bjorn Helgaas , Logan Gunthorpe , Sasha Levin Subject: [PATCH 5.14 128/168] PCI: Fix pci_dev_str_match_path() alloc while atomic bug Date: Mon, 20 Sep 2021 18:44:26 +0200 Message-Id: <20210920163925.873874930@linuxfoundation.org> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20210920163921.633181900@linuxfoundation.org> References: <20210920163921.633181900@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Dan Carpenter [ Upstream commit 7eb6ea4148579b85540a41d57bcec315b8af8ff8 ] pci_dev_str_match_path() is often called with a spinlock held so the allocation has to be atomic. The call tree is: pci_specified_resource_alignment() <-- takes spin_lock(); pci_dev_str_match() pci_dev_str_match_path() Fixes: 45db33709ccc ("PCI: Allow specifying devices using a base bus and path of devfns") Link: https://lore.kernel.org/r/20210812070004.GC31863@kili Signed-off-by: Dan Carpenter Signed-off-by: Bjorn Helgaas Reviewed-by: Logan Gunthorpe Signed-off-by: Sasha Levin --- drivers/pci/pci.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index a5e6759c407b..a4eb0c042ca3 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -265,7 +265,7 @@ static int pci_dev_str_match_path(struct pci_dev *dev, const char *path, *endptr = strchrnul(path, ';'); - wpath = kmemdup_nul(path, *endptr - path, GFP_KERNEL); + wpath = kmemdup_nul(path, *endptr - path, GFP_ATOMIC); if (!wpath) return -ENOMEM; -- 2.30.2